The former principal of Valencia High School is Dr. Paul Priesz. He was named Principal of the Year by the Association of California School Administrators for 2002 and came in 8th place for California's 2004 National High School Principal of the Year . Dr.Paul Priesz is now retired and the new principal of Valencia High School is John Costanzo who was previously the principal of Rio Norte Junior High School .[1]

Valencia High School is ranked in Newsweek's 2012 list of America's Best High Schools. The list is based on six components provided by school administrators: graduation rate (25 percent), college matriculation rate (25 percent), AP/IB/AICE tests taken per student (25 percent), average SAT/ACT scores (10 percent), average AP/IB/AICE scores (10 percent), and AP courses offered per student (5 percent).[2]

1998 - Valencia High School received its first full accreditation from WASC.

2001 - Dr. Paul A. Priesz was named California Principal of the Year. Valencia High School’s student population reached over 3,500 students.

2002 - Dr. Priesz was a finalist for National Principal of the Year. Valencia High School’s API test scores were the highest in the district. The boys’ volleyball program secured the first CIF Championship in the school’s history. Viking Television was presented an international film-making award. Co-Ed Cheer placed first in the state competition.

2004 - Valencia High School dedicated Dr. Paul A. Priesz Stadium. Valencia High School received a full accreditation from WASC.

2006 - Valencia High School had the largest graduating class in William S. Hart District history. The Valencia boys’ volleyball Team won its 3rd CIF championship. Valencia High School is recognized for its state model School-to-Career program. The Viking softball team won the school’s first official National Championship. The Valencia High School choir was chosen to perform in Carnegie Hall, in New York City.

2008 - Valencia High School’s boys’ volleyball team won the National Championship, its 2nd official National Championship in just three years. The school’s softball team went on to clinch another CIF Championship. Valencia High School’s Speech and Debate team won local, state, and national awards. The Valencia High School dance team won a National Championship. This past year marked a number of memorable moments for Valencia High School. For the first time in school history, Valencia scored above 800 on the Academic Performance Index (API). This achievement placed Valencia High School among the top achieving high schools in both the state and the nation. The school’s Mock Trial team won awards at the state level, which advanced them to national competitions.

2009 - The Valencia High School choir performed in Italy at St. Peter’s Basilica during a 10-day choral tour. The Valencia High School dance team brought home another National Championship. Circle of Friends, a program of inclusion for special needs and general education peers, was created.

Valencia High School has an award-winning video program. The video program has entered their productions into competitions such as the Student Television Network, and the Santa Clarita Film Festival. Eric Hernandez won the Best High School Film Award in 2006 for his film "Living Reflection." The video program also features the daily live-television program, VTV. VTV is an early morning news broadcast to the entire school, updating the school on club information, current events, weather, and sports. In 2007, VTV became a member of the National Student Television Network (STN), and participated in the 2007 tournament at the Disneyland hotel. The VTV team took 3rd place at the tournament. In April 2009 VTV also won first place in the 12 Hour Film Festival, for their short film "Hugh takes a Chance". Their other film, Reading to Jack, written and directed by John Savant, won best high school film at the Santa Clarita film festival. Reading to Jack also won best screenplay at STN 2010, and has been entered into other film festivals.[3] In 2012, VTV won Best Picture at the STN Film Festival for their film "Shakespeare and Tacos", and VTV's Macky Brazina won First Place for Anchoring.

The speech and debate team have placed in state and national rankings in the 2000s. The team took second place in the 2009 California state championship for Parliamentary Debate. Eric Smith (class of 2008) was one their very notable debaters, along with Zeke Schumacher, Nick Hall, and Dennis Feldman.

The Valencia High School Choir program consists of 200 students in six separate touring choirs. The VHS Choirs have traveled to Florida, Hawaii, Carnegie Hall and Lincoln Center New York, Italy, Dublin, and London. The Concert Choir and Women's Chamber Ensembles have repeatedly achieved the ratings of "Gold Choir" and "Choir of the Festival" and have been invited to the highly prestigious Festival of Gold numerous times. Their student accompanists have won the honored Maestro Awards (Heritage Festival). Each year for the last four years, Valencia has had multiple students accepted into the California All-State Honor Choir. In May 2008, the Women's Choir Dona Bella was awarded Best Overall Choir, the "Esprit Du Cour - Ensemble of the Festival" and given the highest rating in the nine year history of the San Francisco Music in the Parks. The Dona Bellas received a score of 100 out of 100 from the Contemporary A Cappella Society.

In April 2007, the VHS Vocal Jazz placed third in their debut Reno Jazz Festival performance. In April 2008 they won first place in the national Fullerton Jazz Festival in the "Advanced" category, followed by a "Unanimous Superior" rating at the Vocal Jazz Festival in Greeley, Colorado where students in the vocal jazz group Two N' Four were offered $10,000 in college scholarship money for their performance. In 2009, six students from the VHS Choir program comprised the 15 total Californians chosen to participate in the California All-State Jazz Choir. In 2009 Valencia Choir students performed at the CMEA state convention and internationally to Italy where they will perform mass at St. Peter's Basilica, The Vatican, Rome. In 2012 Valencia Choir performed in Saint Patrick's Cathedral in Dublin, in the Olympic Village, and evensong at Westminster Abbey. In 2013, they performed at Lincoln Center in New York City. Each year, for the last nine years, Valencia Choir has been accepted as one of the honored choirs to perform for the Disney Candlelight Ceremony. Recently, the jazz students performed for the first time at NAMM in 2014.

The Valencia High school band is known as the "Pride of the Vikings". The marching band has participated in the SCSBOA (Southern California Schools Band and Orchestra Association) championships three years consecutively and have been ranked as one of the top "class AAA" bands in Southern California. The marching band receives several awards and recognition yearly, including a personal recognition from the city of Santa Clarita congratulating their performance in the Bands of America Competition in 2009. Both performing groups received a "Superior" rating at the West Ranch High School Festival on March 23, 2011.

The Color Guard performs at home football games and performs at school rallies. They also have competitive seasons both first and second semester of the school year. Within the first semester the team performs with the Valencia High School Marching Band. During the second semester the team takes part in WGASC and WGI competitions in which they perform on their own to recorded music, also known as the winter guard season. In 2007, the Valencia Color guard came in second place in the National Championships during their winter guard season. In 2010 during the field show season, the team won first place at Championships. The Valencia Color guard participated in the WGI World Championships in Dayton Ohio during their winter guard season of 2010.

The school is home of the CA-782nd AFJROTC, a Junior Reserve Officers' Training Corps. The CA-782 uses military techniques to build a cadet run program where students from three schools in the district meet to develop leadership and physical fitness.

The boys volleyball team won 112 consecutive league matches dating back to 2001 before losing 3-1 to Saugus on March 21, 2013. They advanced to the CIF championship game in each season from 2001 to 2006, winning in 2003, 2004, 2006, and most recently in 2008. The Vikings have won CIF in four of the previous six seasons, with a 186-27 record since 2003, posting a school best 35-2 record in 2008.

Valencia Volleyball alumni have been named All-American Volleyball Players and many have received scholarships to play on 7 NCAA Division 1 teams.[citation needed]

Going into the 2008 season, the Vikings were ranked the #1 team in the entire nation by Rivals.com. They finished the season as the #1 team in the nation after defeating Santa Barbara in the CIF-SS DII Championship game, claiming the 4th championship title in the last 6 years. The team won the unofficial national championship in 2006, and the official national title in 2008.

In 2011, The Vikings set the California State mark for most consecutive league victories beating the previous record of 96 held by Loyola High School. The winning streak spanned from 2001- March 21, 2013 (112 games).

In 2006 the girls team went undefeated in all their league meets, while the boys team suffered only five losses. The team has taken second place at League finals in 2005 and 2006. The men's team has also placed second at League finals from 2005-2010.

Softball team The girls softball team has won eight consecutive foothill league champions. They also have won back to back CIF champions in both 2007 and 2008. The lady Vikings were ranked number one in the nation in 2007 with a record of 32-1.